[cisco-voip] Off net to off net transfer using Verizon SIP Trunk

[Bob Zanett (AM)]

Nick,
Run debugs on the gateway to validate that the transfer (re-invite) is getting to your gateway and how it is handling it.   If CUBE, as I recall, it can also block this being sent out.    If it is being routed out, have you validated with your provider that they support this functionality?  And additionally, do they have specific requirements around how they want to see it sent?

Cheers -
Bob Zanett
Technical Services Architect
Dimension Data Americas
From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Nick
Sent: Thursday, February 09, 2012 11:26 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Off net to off net transfer using Verizon SIP Trunk


Hi All

I have an issue when trying to complete an off net to off net transfer for calls using Verizon SIP trunking, the call arrives on the SIP and then gets transfered back out of the SIP to an external destination, I get the message cannot complete transfer on the phone and the transfered part of the call fails but the original call stays on hold.

I have got the Block offnet to offnet transfer set to False on the CUCM, so I think this is definitely the SIP trunks thats denying the call. Does anyone know which part of the SIP header may need manipulating for transfered calls, or anyne come across this scenario before?

Regards

Nick


itevomcid
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